I think ‘master’ is fine for the master branch. It’s a master copy of the codebase.
I think ‘main’ is fine for the main branch. It’s the main branch of the repo.
I use ‘main’ at work cos that’s what my git client defaults to. I use ‘master’ at home because that’s what my git client defaults to. 🤷♂️
Pretty sure it’s the Romanian flag next to a green field